NOAA National Weather Service alerts, predicts, and forecasts climate changes in the United States. This is a Ruby client library for NOAA created by developer Andrew M. Whalen. It contains data to interact with forecast and current weather conditions.
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Although many of us currently use online services for our weather reports, some still like to watch the television for their weather news. The Weather Channel is the main go-to channel for weather, offering weather reports whenever you're in need of them. It recently started to integrate Twitter into the televised reports, searching Twitter for locals talking about the weather. It also has a special site where you can find weather-related tweets for your own city.